I have used CircuitPython in some projects, especially with my children. Python was easier for them than C. For small projects (domestic sensor, remote control car,…) there is no difference in performance. For those use cases that are more demanding and squeeze the possibilities of the SoC to the maximum, obviously, it is not worth it. Taking this into account, I think it is an alternative for many DIY projects that are being done out there

There are free IoT cloud solutions to send and receive data and that work with MQTT protocol for this purpose.

I don’t use conda actually (I did in the past), but I think you could try:

conda shell.bash activate project0

You must see the paths and config used to activate the environment. Check all is fine.

Source: https://docs.conda.io/projects/conda/en/latest/dev-guide/deep-dives/activation.html

What command did you use to activate project0?

Yes, you can. Python has Email package to manage email through STMP protocol. I use it daily in my scripts. Attached link is a tutorial of Real Python:

https://realpython.com/python-send-email/